use std::cmp::*;
use std::collections::*;
use std::error::*;
use std::fs;
use std::io::*;
use std::iter;
use std::path::*;
use std::result::*;
use std::slice;
use std::str;
use std::string::*;
use std::sync::*;
use std::thread;
use std::time::*;

fn main() {
    let stdin = stdin();
    let mut lines = stdin.lock().lines().map(|line| line.unwrap());

    let t: usize = lines.next().unwrap().trim().parse().unwrap(); // 读取测试数据组数

    for _ in 0..t {
        
    }
}
